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The BIOS may provide an ACPI Serial Port Console Redirection (SPCR)
table to describe the serial port to be used for early boot messages.
Add support for parsing the SPCR and instantiating a 16550-based UART.
We do not currently attempt to support other types of UART, since iPXE
does not yet have drivers for other types.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Allow the platform configuration to provide a mechanism for
identifying the serial console UART. Provide two globally available
mechanisms: "null" (i.e. no serial console), and "fixed" (i.e. use
whatever is specified by COMCONSOLE in config/serial.h).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Remove the assumption that all platforms use a fixed number of 16550
UARTs identifiable by a simple numeric index. Create an abstraction
allowing for dynamic instantiation and registration of any number of
arbitrary UART models.
The common case of the serial console on x86 uses a single fixed UART
specified at compile time. Avoid unnecessarily dragging in the
dynamic instantiation code in this use case by allowing COMCONSOLE to
refer to a single static UART object representing the relevant port.
When selecting a UART by command-line argument (as used in the
"gdbstub serial <port>" command), allow the UART to be specified as
either a numeric index (to retain backwards compatiblity) or a
case-insensitive port name such as "COM2".
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Relicense files with kind permission from
Stefan Hajnoczi <stefanha@redhat.com>
alongside the contributors who have already granted such relicensing
permission.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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serial_console_init() would enable serial console support without
knowing if the serial driver succeeded or not. As a result, the
serial console would interfere with a normal keyboard on a system
lacking serial support.
Reported-by: Jan ONDREJ (SAL) <ondrejj(at)salstar.sk>
Signed-off-by: Shao Miller <sha0.miller@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Access to the gpxe.org and etherboot.org domains and associated
resources has been revoked by the registrant of the domain. Work
around this problem by renaming project from gPXE to iPXE, and
updating URLs to match.
Also update README, LOG and COPYRIGHTS to remove obsolete information.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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